659951667 has 6 divisors (see below), whose sum is σ = 953263532. Its totient is φ = 439967772.

The previous prime is 659951651. The next prime is 659951683. The reversal of 659951667 is 766159956.

659951667 is a `hidden beast` number, since 65 + 9 + 9 + 516 + 67 = 666.

It is an interprime number because it is at equal distance from previous prime (659951651) and next prime (659951683).

It is not a de Polignac number, because 659951667 - 2⁴ = 659951651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (659951687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36663973 + ... + 36663990.

Almost surely, 2^659951667 is an apocalyptic number.

659951667 is a deficient number, since it is larger than the sum of its proper divisors (293311865).

659951667 is a wasteful number, since it uses less digits than its factorization.

659951667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73327969 (or 73327966 counting only the distinct ones).

The product of its digits is 3061800, while the sum is 54.

The square root of 659951667 is about 25689.5244603710. The cubic root of 659951667 is about 870.6375152903.

The spelling of 659951667 in words is "six hundred fifty-nine million, nine hundred fifty-one thousand, six hundred sixty-seven".